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Such charts are particularly important for polymers [4] as they are often not compatible with common chemical reagents; this may even depend on how the polymers have been processed. [5] For example, 3-D printing polymer tools used for chemical experiments must be chosen to ensure chemical compatibility with care. [6]
Trifluoroacetic acid in a beaker. TFA is the precursor to many other fluorinated compounds such as trifluoroacetic anhydride, trifluoroperacetic acid, and 2,2,2-trifluoroethanol. [4] It is a reagent used in organic synthesis because of a combination of convenient properties: volatility, solubility in organic solvents, and its strength as an ...
Trifluoroacetic anhydride was originally prepared by the dehydration of trifluoroacetic acid with phosphorus pentoxide. [2] The dehydration might also be carried out with excess α-halogenated acid chlorides. For example, with dichloroacetyl chloride: [3] 2 CF 3 COOH + Cl 2 CHCOCl → (CF 3 CO) 2 O + Cl 2 CHCOOH + HCl
The compound easily reacts with water and moist air to produce the toxic gas hydrogen chloride and trifluoroacetic acid. [3] [4] Trifluoroacetyl chloride is incompatible with a number of other varieties of chemicals, such as amines, alcohols, alkalis, and strong oxidizers. It reacts strongly with amines and alkalis.
It is advised to check the references for photos of reaction results. [1] Reagent testers might show the colour of the desired substance while not showing a different colour for a more dangerous additive. [2]
Trifluoroperacetic acid (trifluoroperoxyacetic acid, TFPAA) is an organofluorine compound, the peroxy acid analog of trifluoroacetic acid, with the condensed structural formula CF 3 COOOH . [ Note 1 ] It is a strong oxidizing agent for organic oxidation reactions, such as in Baeyer–Villiger oxidations of ketones . [ 1 ]
Initially the desired coating is applied in a puddle on the drawdown chart. Then the bar is placed at the top of the chart, and drawn down over the paint in order to spread it evenly along the length of the chart. Once this evenly spread paint dries, it can be tested for a variety of properties. [5]
The following other wikis use this file: Usage on bg.wikipedia.org Трифлуороцетна киселина; Usage on ca.wikipedia.org Àcid trifluoroacètic